RESUMO
We report on a Brazilian patient with a 1.7-Mb interstitial microdeletion in chromosome 1q21.1. The phenotypic characteristics include microcephaly, a peculiar facial gestalt, cleft lip/palate, and multiple skeletal anomalies represented by malformed phalanges, scoliosis, abnormal modeling of vertebral bodies, hip dislocation, abnormal acetabula, feet anomalies, and delayed neuropsychological development. Deletions reported in this region are clinically heterogeneous, ranging from subtle phenotypic manifestations to severe congenital heart defects and/or neurodevelopmental findings. A few genes within the deleted region are associated with congenital anomalies, mainly the RBM8A, DUF1220, and HYDIN2 paralogs. Our patient presents with a spectrum of unusual malformations of 1q21.1 deletion syndrome not reported up to date.
RESUMO
Interstitial duplications of 11q are very rare and seldom reported. In this paper we describe the first case of a duplication involving bands 11q11 and 11q12. This newly described patient has multiple craniosynostoses, congenital heart defect and developmental delay, and is a carrier of a mosaic duplication: 46,XY,dup(11)(q11-->q13.3)(29)/46,XY(6). The breakpoints were further delimited by comparative genomic hybridization microarray. We also performed fluorescent in situ hybridization analysis to determine the extension of the duplication in a patient described earlier with a duplication 11q13.5-q21. An overlapping region of less than 1.2 Mb was identified and included the duplication of genes FGF3 and FGF4 in both individuals. We discuss the possible implications of dosage effects of these genes in the onset of craniosynostosis.